In this lesson, students will investigate the nature of radioactivity and the effect of both distance and shielding materials on different radioactive sources using a Geiger-Muller tube with a counter ...

From outer space to down here on Earth, there are many places where ionizing radiation levels are high enough that they ...

Every year, doctors get better tools to fight cancer. Engineered cancer-killing cells, immunotherapies, targeted drugs, and more are helping clinicians cure more patients. Increasingly, though, ...